Car antenna



FIG. 1 is a left side elevational view of a car antenna showing my new design;

FIG. 2 is a front perspective view thereof;

FIG. 3 is a rear perspective view thereof; and,

FIG. 4 is a left side elevational view thereof affixed to a car.

The broken line showing of a car is for illustrative purposes only and forms no part of the claimed design. 

CLAIM The ornamental design for a car antenna, as shown and described. 